320312703 has 4 divisors (see below), whose sum is σ = 427083608. Its totient is φ = 213541800.

The previous prime is 320312693. The next prime is 320312723. The reversal of 320312703 is 307213023.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 320312703 - 2⁶ = 320312639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320312703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320312723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53385448 + ... + 53385453.

It is an arithmetic number, because the mean of its divisors is an integer number (106770902).

Almost surely, 2^320312703 is an apocalyptic number.

320312703 is a deficient number, since it is larger than the sum of its proper divisors (106770905).

320312703 is a wasteful number, since it uses less digits than its factorization.

320312703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106770904.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 320312703 is about 17897.2820003485. The cubic root of 320312703 is about 684.2131038912.

Adding to 320312703 its reverse (307213023), we get a palindrome (627525726).

The spelling of 320312703 in words is "three hundred twenty million, three hundred twelve thousand, seven hundred three".